[Zootomical Institute, Uniucrsity of Stockholm.) 



On tke Cartilago palatina and tke Organ of Jacob- 

 son in soine Mammals. 



By 

 A. Ärnbäck Ckristie-Linde. 



With 14 figures. 



On the Organ of Jacobson. 



This paper is au addition to what I have published before on 

 the organ of Jacobson in Sorex araneus. Having now had an op- 

 portunity to examine foetal specimens of other Soricidae, I have 

 found a formation of the cartilaginous parts of the above-mentioned 

 organ in a species, Crocidura russula, which may be of soine interest. 



Afterwards in examining the organ of Jacobson in specimens 

 of an other Inseetivore: Twpaja — which Professor Hubrecht in 

 Utrecht has had the kindness to place at my disposal, for which I 

 tender my grateful thanks to him — I have observed the same forma- 

 tion and, besides, some other interesting facts. I therefore now 

 publish the result also of this examination. 



Both in Crocidura and Tapaja I have found a cartilaginous 

 process passing from the upper end of the cartilago paraseptalis 

 (Jacobson's Cartilage) and lying like a short bar on the outer side 

 of the foremost part of the organ. Such an outer bar has been 

 observed before, especially in the Marsupialia, by Broom 1 ), who 

 by comparing it with the corresponding structure in Echidna, has 

 found it to be the remains of a primitive turbinal, an Interpretation 

 which seems to have been generally accepted. At all events, this 

 cartilaginous process has as yet been found only in the lowest 



1 R. Broom, On the comparative anatomy of the organ of Jacobson in 

 the Marsupiais. Proceed. of Linnean Society. New South Wales. Part. 4. 1896. 



Morpholog. Jahrbuch. 48. 23 



